Add 20/15 and 8/90
1st number: 1 5/15, 2nd number: 8/90
20/15 + 8/90 is 64/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
20/15 = 20 × 6/15 × 6 = 120/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Add the two like fractions:
120/90 + 8/90 = 120 + 8/90 = 128/90 - 128/90 simplified gives 64/45
- So, 20/15 + 8/90 = 64/45
In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+8/90 20/15+16/90 20/30+8/90 60/15+8/90 20/15+24/90 20/45+8/90 20/15+40/90 20/75+8/90 20/15+56/90